US 11,725,647 B2
On-demand dual variable displacement positive displacement pumping system
Ryan Susca, Windsor, CT (US); Morgan O'Rorke, West Hartford, CT (US); Matej Rutar, Manchester, CT (US); and Todd Haugsjaahabink, Springfield, MA (US)
Assigned to HAMILTON SUNDSTRAND CORPORATION, Charlotte, NC (US)
Filed by Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed on May 18, 2021, as Appl. No. 17/324,017.
Prior Publication US 2022/0372967 A1, Nov. 24, 2022
Int. Cl. F04B 49/00 (2006.01); F02C 7/236 (2006.01); F04B 1/295 (2020.01); F04B 23/06 (2006.01); F04B 1/324 (2020.01); F04B 1/146 (2020.01)
CPC F04B 49/002 (2013.01) [F02C 7/236 (2013.01); F04B 1/295 (2013.01); F04B 1/324 (2013.01); F04B 23/06 (2013.01); F04B 1/146 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A pumping system for supplying fuel to a jet turbine engine, the pumping system comprising:
a first variable displacement pump comprising a first inlet and a first outlet, wherein the first outlet is fluidically connected to a system outlet;
a first actuator mechanically coupled to a first displacement mechanism of the first variable displacement pump;
a second variable displacement pump comprising a second inlet and a second outlet, wherein the second outlet is fluidically connected to the system outlet;
a second actuator mechanically coupled to a second displacement mechanism of the second variable displacement pump;
an electrohydraulic servo valve hydraulically connected to the first and second actuators; and
an electronic engine controller in communication with the electrohydraulic servo valve and configured to send electrical current to the electrohydraulic servo valve to drive the first actuator and the second actuator,
wherein the first actuator comprises a linear variable differential transducer in communication with the electronic engine controller and configured to measure a linear displacement of the first actuator, and wherein the second actuator comprises a second linear variable differential transducer in communication with the electronic engine controller and configured to measure a linear displacement of the second actuator.